“In 1156, the Chinese author Yeh Meng-te wrote: ‘Since I had plenty of leisure time, I usually rose early in the morning, and then with an empty mind concentrated on the beauty of the fields, trees, rivers, mountains and clouds and I found that I could predict the weather right seven or eight times out of ten. Then I realized that in quietness the universe can be observed, the inner moods felt and real truth obtained.'”
— Quoted in The Cloudspotter’s Guide (2006) by Gavin Pretor-Pinney